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A kind of porous supersoft superfine polyester fiber and its preparation method

A polyester fiber, ultra-fine denier technology, applied in the field of polyester fiber, can solve the problems of poor mechanical properties and uneven dyeing of polyester fiber, and achieve the effects of improving processing performance, improving dyeing performance, and reducing melt viscosity

Active Publication Date: 2018-10-30
JIANGSU HENGLI CHEM FIBER
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] The purpose of the present invention is to overcome the problems of uneven dyeing and poor mechanical properties of existing polyester fibers, realize large-scale production and spinning, and provide a porous ultra-soft and ultra-fine polyester fiber and its preparation method

Method used

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  • A kind of porous supersoft superfine polyester fiber and its preparation method
  • A kind of porous supersoft superfine polyester fiber and its preparation method
  • A kind of porous supersoft superfine polyester fiber and its preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0063] A preparation method of modified polyester, specifically comprising the following steps:

[0064] (1) Preparation of glycol terephthalate:

[0065] Add terephthalic acid and 2-pentyl-1,6 hexanediol into a slurry with a molar ratio of 1:1.3 and add it to the reactor at a concentration of 50 wt%, and the amount added is 0.3% of the weight of terephthalic acid Under the catalysis of concentrated sulfuric acid, the esterification reaction is carried out. The esterification reaction is pressurized in a nitrogen atmosphere. The pressurized pressure is normal pressure and the temperature is 180°C. 90% is the end point of the esterification reaction to obtain diol terephthalate;

[0066] (2) Preparation of ethylene terephthalate:

[0067] Put terephthalic acid and ethylene glycol into a slurry with a molar ratio of 1:1.2 and put them into the reactor to carry out esterification reaction. The esterification reaction is pressurized in a nitrogen atmosphere. The pressurized pres...

Embodiment 2

[0072] A preparation method of modified polyester, specifically comprising the following steps:

[0073] (1) Preparation of glycol terephthalate:

[0074] Put terephthalic acid and 2-hexyl-1,6-hexanediol in a molar ratio of 1:1.38 into a slurry and add it to the reactor at a concentration of 55 wt%, and the addition amount is 0.32% of the weight of terephthalic acid Under the catalysis of concentrated sulfuric acid, esterification reaction is carried out. The esterification reaction is pressurized in a nitrogen atmosphere. The pressurized pressure is 0.13 MPa and the temperature is 181 °C. % is the end point of the esterification reaction to obtain diol terephthalate;

[0075] (2) Preparation of ethylene terephthalate:

[0076] Put terephthalic acid and ethylene glycol into a slurry with a molar ratio of 1:1.3 and add them into the reactor to carry out esterification reaction. The esterification reaction is pressurized in a nitrogen atmosphere. The pressurized pressure is 0....

Embodiment 3

[0081] A preparation method of modified polyester, specifically comprising the following steps:

[0082] (1) Preparation of glycol terephthalate:

[0083] Put terephthalic acid and 2-heptyl-1,6 hexanediol in a molar ratio of 1:1.33 into a slurry and add it to the reactor at a concentration of 55 wt%, and the amount added is 0.33% of the weight of terephthalic acid Under the catalysis of concentrated sulfuric acid, the esterification reaction is carried out. The esterification reaction is pressurized in a nitrogen atmosphere. The pressurized pressure is 0.12MPa and the temperature is 183°C. 92% is the end point of the esterification reaction to obtain diol terephthalate;

[0084] (2) Preparation of ethylene terephthalate:

[0085] Put terephthalic acid and ethylene glycol into a slurry with a molar ratio of 1:1.31 and put them into the reactor to carry out esterification reaction. The esterification reaction is pressurized in a nitrogen atmosphere. The pressurized pressure is...

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Abstract

The invention relates to a porous supersoft superfine polyester fiber and a preparation method thereof. The modified polyester is spun through a porous spinneret to prepare a porous supersoft superfine polyester fiber; The arrangement of the holes is elliptical, that is, the centers of the spinneret holes are located on concentric ellipses, and the concentric ellipses are a series of ellipses. The major axes of all ellipses are collinear, and the minor axes are collinear. Porous ultra-soft and ultra-fine polyester fiber is made from modified polyester chips through metering, extrusion, cooling, oiling and high-speed winding. The preparation method of modified polyester is: the reaction of terephthalic acid and ethylene glycol Prepare ethylene glycol terephthalate, add terephthalic acid glycol ester prepared by reacting terephthalic acid and branched hexanediol, and continue the reaction to obtain modified polyester. The fiber prepared by the invention has excellent properties, linear density deviation rate ≤ 0.5%, breaking strength CV value ≤ 4.0%, breaking elongation CV value ≤ 8.0%, and evenness unevenness CV value ≤ 2.0%.

Description

technical field [0001] The invention belongs to the field of polyester fibers, and relates to a porous supersoft superfine polyester fiber and a preparation method thereof. Background technique [0002] Since its inception, polyethylene terephthalate (PET fiber or polyester fiber) fiber has high breaking strength and elastic modulus, moderate resilience, excellent heat setting, good heat resistance and light resistance, acid resistance, alkali resistance and corrosion resistance. It has a series of excellent performances, such as anti-wrinkle and non-ironing, and good crispness. It is widely used in clothing, home textiles and other fields. [0003] However, due to the high crystallinity and compact structure of PET, and there is no functional group combined with the dye on the molecular chain, it is difficult for the dye molecule to enter the fiber and dyeing is difficult. Can't satisfy people to bright-coloured beautiful, the fabric demand of unique style. [0004] The r...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D01F6/92D01F1/10C08G63/183D01D5/08D01D5/253D01D5/088
CPCC08G63/183D01D5/08D01D5/088D01D5/253D01F1/10D01F6/92D01D5/247D01D4/02D01F6/84C08G63/916D10B2331/04
Inventor 范红卫王山水丁竹君王丽丽钮臧臧孙晓华
Owner JIANGSU HENGLI CHEM FIBER